2005 Microchip Technology Inc.

DS21981A-page 1

MCP2030

Device Features:

· Three input pins for analog input signals

· High input detection sensitivity (3 mV

, typical)

· High modulation depth sensitivity (as low as 8%)

· Three output selections:

- Demodulated data

- Carrier clock

- RSSI

· Input carrier frequency: 125 kHz, typical

· Input data rate: 10 Kbps, maximum

· 8 internal Configuration registers

· Bidirectional transponder communication

(LF talk back)

· Programmable antenna tuning capacitance

(up to 63 pF, 1 pF/step)

· Programmable output enable filter

· Low standby current: 4

A (with 3 channels

enabled), typical

· Low operating current: 13

A (with 3 channels

enabled), typical

· Serial Peripheral Interface (SPITM) with external

devices

· Supports Battery Back-Up mode and batteryless

operation with external circuits

· Industrial and Extended Temperature Range:

-40°C to +85°C (industrial)

Typical Applications:

· Automotive industry applications:

- Passive Keyless Entry (PKE) transponder

- Remote door locks and gate openers

- Engine immobilizer

- LF initiator sensor for tire pressure monitoring

systems

· Security Industry applications:

- Long range access control transponder

- Parking lot entry transponder

- Hands-free apartment door access

- Asset control and management

Description:

The MCP2030 is a stand-alone Analog Front-End
(AFE) device for Low-Frequency (LF) sensing and bidi-
rectional communication applications. The device has
eight internal Configuration registers which are
readable and programmable, except the read-only
STATUS register, by an external device.

The device has three low-frequency input channels.
Each input channel can be individually enabled or dis-
abled. The device can detect an input signal with ampli-
tude as low as ~1 mV

and can demodulate an

amplitude-modulated input signal with as low as 8%
modulation depth. The device can also transmit data by
clamping and unclamping the input LC antenna
voltage.

The device can output demodulated data, carrier clock
or RSSI current depending on the register setting. The
demodulated data and carrier clock outputs are avail-
able on the LFDATA pin, while the RSSI output is avail-
able on the RSSI pin. The RSSI current output is
linearly proportional to the input signal strength.

The device has programmable internal tuning capaci-
tors for each input channel. The user can program
these capacitors up to 63 pF, 1 pF per step. These
internal tuning capacitors can be used effectively for
fine-tuning of the external LC resonant circuit.

The device is optimized for very low current consump-
tion and has various battery-saving low-power modes
(Sleep, Standby, Active). The device can also be oper-
ated in Battery Back-up and Batteryless modes using a
few external components.

This device is available in 14-pin PDIP, SOIC, and
TSSOP packages. This device is also used as the AFE
in the PIC16F639.

Package Types:

LCCOM

LCX

LFDATA/

LCZ

LCY

SCLK/ALERT

RSSI

CCLK/SDIO

MCP2030

PDIP, SOIC, TSSOP

Three-Channel Analog Front-End Device

2005 Microchip Technology Inc.

DS21981A-page 3

MCP2030

1.0

ELECTRICAL SPECIFICATIONS

Absolute Maximum Ratings

()

Ambient temperature under bias...................-40°C to +125°C

Storage temperature .................................... -65°C to +150°C

Voltage on V

with respect to V

............... -0.3V to +6.5V

Voltage on all other pins with
respect to V

...................................... -0.3V to (V

+ 0.3V)

Maximum current out of V

pin .................................300 mA

Maximum current into V

pin ....................................250 mA

Maximum LC Input Voltage
(LCX, LCY, LCZ) loaded, with device........................ 10.0 V

Maximum LC Input Voltage
(LCX, LCY, LCZ) unloaded, without device............. 700.0 V

Maximum Input Current (rms) into device
per LC Channel .............................................................10 mA

Human Body ESD rating ....................................2000 (min.) V

Machine Model ESD rating ..................................200 (min.) V

Notice: Stresses above those listed under "Maximum
Ratings" may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operation listings of this specification is not implied. Exposure
to maximum rating conditions for extended periods may affect
device reliability.

DC Characteristics

Electrical Specifications: Standard Operating Conditions (unless otherwise stated)
Operating temperature

-40

+85

LC Signal Input

Sinusoidal 300 mV

Carrier Frequency

125 kHz

LCCOM connected to V

Parameters

Sym.

Min.

Typ

Max.

Units

Conditions

Supply Voltage

2.0

3.0

3.6

Start Voltage to ensure internal

Power-on Reset signal

POR

1.8

Modulation Transistor-on Resistance

100

= 3.0V

Active Current (detecting signal)
1 LC Input Channel Receiving Signal
3 LC Input Channel Receiving Signals

ACT

--
--

10
13

CS = V

Input = Continuous Wave (CW);
Amplitude = 300 mV

All channels enabled.

Standby Current (wait to detect signal)
1 LC Input Channel Enabled
2 LC Input Channels Enabled
3 LC Input Channels Enabled

STDBY

--
--
--

2
3
4

5
6
7

CS = V

; ALERT = V

Sleep Current

SLEEP

0.2

CS = V

; ALERT = V

Analog Input Leakage Current

LCX, LCY, LCZ

LCCOM

AIL

--
--

= 3.6V, V

1V with respect to

ground. Internal tuning capacitors are switched
off, tested in Sleep mode.

Digital Input Low Voltage

0.3 V

SCLK, SDI, CS

Digital Input High Voltage

0.8 V

SCLK, SDI, CS

Digital Input Leakage Current (Note 1)
SDI
SCLK, CS

--
--

= 3.6V

Digital Output Low Voltage
ALERT, LFDATA/SDIO

0.4

Analog Front-End section
I

= 1.0 mA, V

= 2.0V

Digital Output High Voltage
ALERT, LFDATA/SDIO

- 0.5

= -400

A, V

= 2.0V

Digital Input Pull-Up Resistor
CS, SCLK

200

350

= 3.6V

These parameters are characterized but not tested.

Data in "Typ" column is at 3.0V, +25

C unless otherwise stated. These parameters are for design guidance only and are not tested.

Note

Negative current is defined as current sourced by the pin.

MCP2030

DS21981A-page 4

2005 Microchip Technology Inc.

AC Characteristics

Electrical Specifications: Standard Operating Conditions (unless otherwise stated)
Supply Voltage

2.0V

3.6V

Operating temperature

-40°C

+85°C

LCCOM connected to V

LC Signal Input

Sinusoidal 300 mV

Carrier Frequency

125 kHz

LCCOM connected to V

Parameters

Sym.

Min.

Typ

Max.

Units

Conditions

Input Sensitivity

SENSE

3.0

= 3.0V

Output enable filter disabled
AGCSIG =

; MODMIN =

(33% modulation depth setting)
Input = Continuous Wave (CW)
Output = Logic level transition from
low-to-high at sensitivity level for CW input.

Coil de-Q'ing Voltage -
RF Limiter (R

FLM

) must be active

DE_Q

= 3.0V, Force I

= 5

A (worst case)

RF Limiter Turn-on Resistance
(LCX, LCY, LCZ)

FLM

300

700

= 2.0V, V

= 8 V

Sensitivity Reduction

ADJ

--
--

-30

--
--

dB
dB

= 3.0V

No sensitivity reduction selected
Max. reduction selected
Monotonic increment in attenuation value
from setting =

0000

1111

by design

Minimum Modulation Depth
60% setting
33% setting
14% setting
8%

IN_MOD

--
--
--

60
33
14

84
49
26

%
%
%
%

= 3.0V

See Section 5.21 "Minimum Modulation
Depth Requirement for Input Signal".
See Modulation Depth Definition in
Figure 5-5.

Carrier frequency

CARRIER

125

kHz

Input modulation frequency

MOD

kHz

Input data rate with NRZ data format.
V

= 3.0V

Minimum modulation depth setting = 33%
Input conditions:
Amplitude = 300 mV

Modulation depth = 100%

LCX Tuning Capacitor

TUNX

= 3.0V,

Config. Reg. 1, bits <6:1> Setting =

000000

63 pF ±30%
Config. Reg. 1, bits <6:1> Setting =

111111

63 steps, approx. 1 pF/step
Monotonic increment in capacitor value from
setting =

000000

111111

by design

LCY Tuning Capacitor

TUNY

= 3.0V,

Config. Reg. 2, bits <6:1> Setting =

000000

63 pF ±30%
Config. Reg. 2, bits <6:1> Setting =

111111

63 steps, approx. 1 pF/step
Monotonic increment in capacitor value from
setting =

000000

111111

by design

LCZ Tuning Capacitor

TUNZ

= 3.0V,

Config. Reg. 3, bits<6:1> Setting =

000000

63 pF ±30%
Config. Reg. 3, bits<6:1> Setting =

111111

63 steps, approx. 1 pF/step
Monotonic increment in capacitor value from
setting =

000000

111111

by design

Q of Internal Tuning Capacitors

Q_C

50 *

Demodulator Charge Time
(delay time of demodulated output to rise)

= 3.0V

Minimum modulation depth setting = 33%
Input conditions:
Amplitude = 300 mV

Modulation depth = 100%

Parameter is characterized but not tested.

Data in "Typ" column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not tested.

Note

Required output enable filter high time must account for input path analog delays (= T

OEH

- T

+ T

Required output enable filter low time must account for input path analog delays (= T

OEL

+ T

- T

2005 Microchip Technology Inc.

DS21981A-page 5

MCP2030

Demodulator Discharge Time (delay time
of demodulated output to fall)

= 3.0V

MOD depth setting = 33%
Input conditions:
Amplitude = 300 mV

Modulation depth = 100%

Rise time of LFDATA

LFDATA

0.5

3.0V. Time is measured from 10% to

90% of amplitude

Fall time of LFDATA

LFDATA

0.5

3.0V

Time is measured from 10% to 90% of
amplitude

AGC stabilization time
(T

AGC +

PAGC

)

STAB

AGC initialization time

AGC

3.5

High time after AGC initialization time

PAGC

62.5

Gap time after AGC stabilization time

GAP

200

Time element of pulse

100

Minimum pulse width

Time from exiting Sleep or POR to being
ready to receive signal

RDY

50*

Minimum time AGC level must be held
after receiving AGC Preserve command

PRES

AGC level must not change more than 10%
during T

PRES

Internal RC oscillator frequency

OSC

35.5

kHz

Internal clock trimmed at 32 kHz during test

Inactivity timer time-out

INACT

13.5

17.75

512 cycles of RC oscillator @ F

OSC

Alarm timer time-out

ALARM

35.5

1024 cycles of RC oscillator @ F

OSC

LC Pin Input Resistance for
LCX, LCY, LCZ pins

800*

LCCOM grounded, V

= 3V,

CARRIER

= 125 kHz.

LC Pin Input Parasitic Capacitance for
LCX, LCY, LCZ pins

24*

LCCOM grounded, V

= 3V,

CARRIER

= 125 kHz.

Minimum output enable filter high time
OEH (Bits Config0<8:7>)

= 1 ms

= 2 ms

= 4 ms

= Filter Disabled

OEH

32 (~1 ms)
64 (~2 ms)

128 (~4 ms)

--
--
--
--

clock

count

RC oscillator = F

OSC

(see F

OSC

specification

for variations).
Viewed from the pin input:
(Note 1)

Minimum output enable filter low time
OEL (Bits Config0<6:5>)

= 1 ms

= 2 ms

= 4 ms

OEL

32 (~1 ms)
32 (~1 ms)
64 (~2 ms)

128 (~4 ms)

--
--
--
--

clock

count

RC oscillator = F

OSC

Viewed from the pin input:
(Note 2)

Maximum output enable filter period

OEH

OEL

OEH

OEL

= 1 ms

1 ms (Filter 1)

= 1 ms

1 ms (Filter 1)

= 1 ms

2 ms (Filter 2)

= 1 ms

4 ms (Filter 3)

OET

--
--
--
--

96 (~3 ms)
96 (~3 ms)

128 (~4 ms)
192 (~6 ms)

clock

count

RC oscillator = F

OSC

= 2 ms

1 ms (Filter 4)

= 2 ms

1 ms (Filter 4)

= 2 ms

2 ms (Filter 5)

= 2 ms

4 ms (Filter 6)

--
--
--
--

128 (~4 ms)
128 (~4 ms)
160 (~5 ms)
250 (~8 ms)

= 4 ms

1 ms (Filter 7)

= 4 ms

1 ms (Filter 7)

= 4 ms

2 ms (Filter 8)

= 4 ms

4 ms (Filter 9)

--
--
--
--

192 (~6 ms)
192 (~6 ms)
256 (~8 ms)

320 (~10 ms)

= Filter Disabled

LFDATA output appears as long as input
signal level is greater than V

SENSE

AC Characteristics (Continued)

Electrical Specifications: Standard Operating Conditions (unless otherwise stated)
Supply Voltage

2.0V

3.6V

Operating temperature

-40°C

+85°C

LCCOM connected to V

LC Signal Input

Sinusoidal 300 mV

Carrier Frequency

125 kHz

LCCOM connected to V

Parameters

Sym.

Min.

Typ

Max.

Units

Conditions

Parameter is characterized but not tested.

Data in "Typ" column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not tested.

Note

Required output enable filter high time must account for input path analog delays (= T

OEH

- T

+ T

Required output enable filter low time must account for input path analog delays (= T

OEL

+ T

- T

Part Number MCP2030

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